mortar bed query...
Threshold/step, that is too deep to accomodate a standard threshold.
Possible solution. Slanted mosaic so that water drains off the tiles and away from the door.
Issues. One door is on a slab, another is on a 2x8 sill resting on a short brick wall (the step/threshold).
Per my research something called a "mortar bed" is what is installed first.
I have at best about an inch, a quarter of which will accomodate the tile. This will slant to about a 1/2 inch. Not alot of room for multiple layers.
Would it be okay to just set the tile into straight mortar, then grout and seal on top of that. Or would this cause a problem I am not thinking of?
I purchased some exterior thin set thinking I could just slope that and set the tiles in, but I have since read that mortar is more waterproof and stronger?
It needs to be as waterproof as possible.
Thank you for reading.
Neither mortar or thinset is waterproof. It can however be waterproofed topically. Thinset also may not be suitable to build a slope in some cases, it doesn't work like that necessarily.:)
Thanks for the reply.
I realize that I am testing the boundaries when it comes to my wacky old house.
I could spend 2 days sanding a sloped piece of 1x10 that I can watch rot in the rain.
There has to be a solution.
Do you think if I top coated the slanted mosaic in a mortar bed, with sealed grout. That would be sound?
I could attempt to put a waterproof membrane underneath it all. However I think all that will do is let water sit on the membrane. It is a level sill.
Issues. I have a house of issues.
Why not install the membrane "OVER" the substrate and tile to that.?
Grout also isn't waterproof, even if it is sealed.
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